JPH05112397A - Oil feeder - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To prevent unnecessary power consumption and overheating in the fuel supply system that supplies fuel oil to multiple metering devices by a common pump. A nozzle switch that outputs a refueling command signal when a refueling nozzle 3 to be supplied to an automobile fuel tank is removed from the main body via a flow meter 1 that receives fuel oil supplied from a common liquid feed pump 10 through a pipe 12 6 Measuring devices I to III provided with a control device 7 that determines that the refueling command signal is continuously output for a predetermined time in the refueling stopped state and closes the solenoid valve 2, and the oil level of the oil storage tank 11 An oil level detecting means 16 for detecting, an oil level managing means 15 for outputting a pump drivable signal when the suction port of the liquid feed pump 10 is located below the oil level, and both an oil supply signal and a pump drivable signal are output. And a pump control device 13 for operating the liquid feed pump by detecting that

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device in which a plurality of metering devices are connected to one liquid feed pump.

[0002]

2. Description of the Related Art Along with the increase in the size of oil supply equipment, there has been proposed an oil supply device in which a plurality of metering devices are connected to a common liquid supply pump. Compared with an oil supply device equipped with a pump, a liquid supply mechanism for each oil supply device is not required, so there is an advantage that cost can be reduced and maintenance can be simplified. However, in such a device, since the liquid feed pump is provided in the oil storage tank away from the refueling site, it cannot be detected by sound or vibration that the liquid feed pump is being driven. As a result, do not notice that the refueling nozzle is half-hanged on the nozzle hook, that is, the nozzle switch is left ON, and keep pump motor operating even though liquid feeding is not required. As a result, there is a problem that the pump is overheated or power is consumed unnecessarily, resulting in an increase in running cost.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to protect a liquid feed pump and prevent unnecessary power consumption. It is to provide a new refueling device capable of

[0004]

In order to solve such a problem, in the present invention, a flow meter which receives supply of fuel oil from a common liquid feed pump through a pipe and a fuel oil from the flow meter are provided. A fueling nozzle to be supplied to an automobile fuel tank, a nozzle switch that outputs a signal when the fueling nozzle is removed from the main body, a fueling signal that is output by receiving a signal from the nozzle switch, and a signal that is output from the nozzle switch. , A metering device equipped with a control device that stops the output of the refueling signal by judging that the refueling stopped state continues for a predetermined time, the oil level that detects the liquid level of the tank in which the liquid delivery pump is installed. Detection means, an oil level management device that outputs a pump drivable signal when the suction port of the liquid feed pump is located below the liquid level, and both the oil supply signal and the pump drivable signal are output. And to include a pump motor controller for operating the liquid feed pump by the.

[0005]

The liquid feed pump is operated on condition that the fuel oil in the oil storage tank exists above the suction port of the pump and that the oil supply signal is output from one of the metering devices. This prevents unnecessary operation of the liquid feed pump, saves electric power, and prevents damage to the liquid feed pump.

[0006]

The details of the present invention will now be described with reference to the illustrated embodiments. FIG. 1 shows an embodiment of the present invention, in which reference numerals I, II, and III in the drawing are metering devices, respectively, which indicate liquid feed pumps described below, that is, pipes 12 communicating with a submerged pump 10. A flow meter 1 to be connected, an oil supply nozzle 3 connected to the discharge port side of the flow meter 1 via a solenoid valve 2, a flow rate pulse transmitter 4 for outputting the flow rate of the flow meter 1 as a pulse signal, and an oil supply nozzle. Nozzle switch 6 that is turned on when 3 is removed from the nozzle hook 5, and is turned off when the refueling nozzle 3 is returned to the nozzle hook 5, a control device 7 that operates based on a flowchart described later, and a refueling operation. After being installed in an office or the like via a cable 18, an alarm device 23 that outputs an alarm and an indicator 8 that displays information such as the amount of refueling are provided when the state of not performing continues for a certain time or longer. And it is connected to the pump motor controller 13.

[0007] 10 is an oil storage tank 11 provided underground
In the submerged pump described above, the motor and pump are housed in a case and installed in fuel oil, and are connected to a plurality of weighing devices I to III by a pipe 12. The pump 10 has a capacity capable of simultaneous refueling at a predetermined flow rate, and is started and stopped by a signal from the pump motor control device 13. An oil amount management device 15 is configured to convert an oil level signal from an oil level detection means 16 installed in the tank 11 into an oil amount and output the oil level signal to the pump motor control device 13 and the display unit 17. ing. Note that reference numeral 19 in the figure denotes a POS device that issues a voucher or the like after the end of refueling.

FIG. 2 shows an embodiment of the control device 7 provided in each of the weighing devices I to III. Reference numeral 20 in the drawing is counting means, and the nozzle switch 6 is turned on. The flow rate pulse from the flow rate pulse generator 4 is sometimes reset to zero and is converted into the amount of oil supply. Reference numeral 21 denotes a timing means, which is set when the nozzle switch 6 is ON, and is reset each time a flow rate pulse is input, and the output signal is stopped when a preset time T, for example, 4 minutes has elapsed after the start of the timing. Is configured to. 22 is a logical product gate, the nozzle switch 6 is ON
In this state, while receiving the signal from the time measuring means 21, the oil supply signal is output to the pump motor control means 13 and the solenoid valve 2 is opened. 24 is
When four minutes have passed from the time measuring means 21 by the inverter and the output signal has stopped, the alarm 23 is activated to prompt the fueling nozzle hooking.

FIG. 3 shows an embodiment of the oil amount management device 15, in which reference numeral 30 is an oil amount calculating means, which is an oil level signal from the oil level detecting means 16 and a calculation formula storing means. The fuel oil amount Qx remaining in the tank 11 is calculated based on the calculation formula stored in 31 and is output to the indicator 17 and the comparison means 32. This comparison means 32
Oil quantity Qx from the oil quantity calculation means 30 and reference value storage means 33
The reference value Q stored in, that is, the minimum oil amount at which the suction port of the submerged pump 10 can be maintained below the oil level is compared, and when Qx> Q, a pump drivable signal is output and both of them are output. It is configured to stop outputting the signal when they match.

FIG. 4 shows an embodiment of the pump motor control device 13, in which reference numeral 42 is a logical product gate, which is a liquid supply from the control means 7 of each of the measuring devices I, II and III. When the command signal is received via the OR gate 41 and the signal from the oil amount management device 15, and the pump drivable signal is input from the oil amount management device 15, at least one of the weighing devices is received. When the refueling command signal is input from the stand, the submerged pump 10 is operated, and when the refueling command signals from all of the weighing devices I to III are not input, the submerged pump 10 is stopped, and further, the tank 11 When the fuel oil is below the reference value Q and the pump drive enable signal is input from the oil amount management device 15, the submerged pump 10 is stopped regardless of the input of the refueling command signal. It operates to maintain.

Next, the operation of the apparatus thus constructed will be described with reference to the flow charts shown in FIGS. 5, 6 and 7. (Operation of the oil level management device 15: FIG. 5) When the oil level signal from the oil level detection means 16 is input (step a in FIG. 5), the inside of the tank 11 is calculated based on the calculation formula stored in the calculation formula storage means 31. The amount Qx of the remaining fuel oil is calculated and displayed on the display 17 (step B in FIG. 5) and compared with the reference value Q in the reference value storage means 33 (step C in FIG. 5). As a result of this comparison, when the oil amount Qx in the tank 11 is larger than the reference value Q, the submerged pump 1
Since the suction port of 0 is located below the liquid surface, a pump drivable signal is output to the pump motor control device 13 (step D in FIG. 5), and if the oil amount Qx is smaller than the reference value Q, refueling Since the suction port of the submerged pump 10 may be exposed on the liquid surface, the pump drivable signal output is stopped (step E in FIG. 5).

(Operation of the weighing devices I to III: FIG. 6) When the fueling nozzle 3 of the weighing device is removed and the nozzle switch 6 is turned on (step a in FIG. 6), the counting means 20 is reset and the display 8 Is reset to zero, the counting means 21 is set, the solenoid valve 2 is opened, and an oil supply signal is output to the pump motor control device 13 (step B). Then, the fuel oil is supplied from the submerged pump 10 to each metering device I to
Pumped to III.

In this state, when the nozzle 3 is inserted into the vehicle fuel tank and the refueling lever (not shown) is pulled up, the fuel oil fed by the pipe 12 flows into the vehicle fuel tank via the flow meter 1. As a result, the flow rate pulse is output from the flow rate pulse transmitter 4 (step in FIG. 6).
C). This flow rate pulse is counted by the counting means 20 and displayed on the display 8 as the amount of refueling, and is also input to the timing means 21 to reset the timing operation (step d in FIG. 6). In this way, when the refueling amount becomes the predetermined amount and the refueling lever is returned to stop the refueling, the flow rate pulse from the flow rate pulse transmitter 4 is interrupted (step C in FIG. 6), and therefore the timing means 21 must be reset. Instead, it will continue timing (Fig. 6, Step E).

Immediately after the end of refueling, that is, the time measuring means 21
When the refueling nozzle 3 is returned to the nozzle hook 5 and the nozzle switch 6 is turned off within a time shorter than the time T set in (step F) (step 6 in FIG. 6), the controller 7 turns on the solenoid valve 2. The liquid supply to the liquid supply nozzle 3 is closed and the liquid supply to the liquid supply nozzle 3 is cut off, and the output of the oil supply signal to the pump control device 13 is stopped (step S in FIG. 6).

On the other hand, although the refueling is completed and the output of the flow rate pulse is stopped, The nozzle 3 is not returned to the nozzle hook 5 (step 6 in FIG. 6), and the nozzle switch 6 is turned on.
When the count value Tx coincides with the set value T, for example, 4 minutes (step F), the signal from the time measuring means 21 is stopped and the solenoid valve 2 continues. To shut off the liquid supply to the liquid supply nozzle 3,
Stop outputting the refueling signal. Then, the alarm device 23 is activated to give an alarm, "Please put the nozzle on the proper position quickly".

The amount of fuel oil Q in the tank 11 due to refueling
When the oil consumption decreases and the reference value Qx is reached, a pump drive disable signal is output from the oil amount management device 13 (step E in FIG. 5). As a result, even if the refueling start command signal is output from the weighing devices I to III, the submerged pump 1
Since 0 maintains the stopped state, it prevents the pump from operating in the state where the suction port is exposed to the atmosphere and prevents the occurrence of failure.

(Operation of pump motor control device: FIG. 7) An oil supply signal is input from one of the control devices 7 of the weighing devices I to III (steps I to C in FIG. 7), and the oil amount management device 1
When the pump drive enable signal is input from 5 (step d in FIG. 7), the pump motor control device 13 operates the submerged pump 10 (step d in FIG. 7).
E). In this state, the fuel oil is supplied from the tank 11 to each metering device, so that any metering device can supply fuel.

When the input of the fueling signal from all of the weighing devices I to III is stopped due to the end of the fueling operation or the like (steps 7 to 7 in FIG. 7), the pump motor control device 13 stops the submerged pump 10 and becomes useless. Prevent power consumption (steps). On the other hand, when the oil amount Q in the tank decreases to the reference value Qx and the input of the pump drivable signal from the oil amount management device 15 stops while the submerged pump 10 is operating (step F in FIG. 7), the pump motor control device Reference numeral 13 stops the operation of the pump 10 (step 7 in FIG. 7) to prevent the pump from being damaged.

In this embodiment, the oil amount is stored as the reference value Qx, and the current oil amount Q is compared with the reference value Qx to judge the positional relationship between the pump suction port and the liquid surface. , The liquid level in the oil storage tank is stored as a reference value,
Even if the position of the pump suction port is judged by comparing the current liquid level with the reference value, it is apparent that the same action is achieved.

As described above, according to the present invention,
A flow meter that receives fuel oil supplied from a common liquid feed pump via piping, a fuel nozzle that supplies fuel oil from the flow meter to an automobile fuel tank, and a nozzle switch that outputs a signal when the fuel nozzle is removed from the main unit. Control that outputs the refueling signal in response to the signal from the nozzle switch, and determines that the refueling stop state has continued for a predetermined time while the signal from the nozzle switch is being output, and stops the refueling signal output A metering device equipped with a device, an oil level detecting means for detecting the liquid level of the tank in which the liquid feed pump is installed, and a pump drive enable signal is output when the suction port of the liquid feed pump is located below the liquid level Since the oil level control device and the pump motor control device for operating the liquid feed pump by outputting both the oil supply signal and the pump drive enable signal are provided, all the measuring devices are provided. Not only can you stop the liquid feed pump automatically to prevent unnecessary power consumption when it is in a resting state, but you can also feed liquid even if the nozzle is not returned to the nozzle for a long time after the end of refueling. The pump can be stopped, and further, when the suction port of the pump is located above the liquid surface, the liquid supply pump can be stopped to prevent the pump from overheating or fail.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an apparatus showing an embodiment of the present invention.

FIG. 2 is a block diagram showing an embodiment of a control device provided in the weighing device in the same device.

FIG. 3 is a block diagram showing an embodiment of the oil amount management device in FIG.

FIG. 4 is a block diagram showing an embodiment of the pump motor control device in FIG.

5 is a flowchart showing the operation of the oil quantity management device, among the operations of the device shown in FIG. 1. FIG.

FIG. 6 is a flowchart showing the operation of the weighing device, among the operations of the device shown in FIG. 1.

FIG. 7 is a flowchart showing an operation of the pump motor control device among the operations of the device shown in FIG.

[Explanation of symbols]

 I, II, III Metering device 1 Flowmeter 2 Solenoid valve 3 Refueling nozzle 4 Flow rate pulse transmitter 6 Nozzle switch 8 Display 10 Submerged pump 11 Oil storage tank 13 Pump motor controller 15 Oil quantity management device 16 Oil level detection means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Somei Shigaura 2-12-13 Shibaura, Minato-ku, Tokyo Tatsuno Co., Ltd. (72) Inventor Atsushi Fukumoto 2-12-13 Shibaura, Minato-ku, Tokyo Tokyo Tatsuno Co., Ltd.

Claims (1)

[Claims] 1. A flow meter which receives supply of fuel oil from a common liquid feed pump through a pipe, an oil supply nozzle for supplying fuel oil from the flow meter to an automobile fuel tank, and the oil supply nozzle removed from the main body. A nozzle switch that sometimes outputs a signal, receives a signal from the nozzle switch, and outputs a refueling signal,
A metering device having a control device that stops the output of the oil supply signal by determining that the oil supply stop state continues for a predetermined time while the signal from the nozzle switch is being output, and the liquid delivery pump is installed. Oil level detection means for detecting the liquid level in the tank, an oil level management device for outputting a pump drivable signal when the suction port of the liquid feed pump is located below the liquid level, the oil supply signal and the pump drivable signal And a pump motor control device for operating the liquid delivery pump when both are output.